Let's Encrypt client and ACME library written in Go.

Features

• Register with CA
• Obtain certificates, both from scratch or with an existing CSR
• Renew certificates
• Revoke certificates
• Robust implementation of all ACME challenges
  • HTTP (http-01)
  • DNS (dns-01)
  • TLS (tls-alpn-01)
• SAN certificate support
• Comes with multiple optional DNS providers
• Custom challenge solvers
• Certificate bundling
• OCSP helper function

lego introduced support for ACME v2 in v1.0.0. If you still need to utilize ACME v1, you can do so by using the v0.5.0 version.

Installation

How to install.

Usage

• as a CLI
• as a library

Documentation

Documentation is hosted live at https://go-acme.github.io/lego/.

DNS providers

Detailed documentation is available here.

Akamai EdgeDNS	Alibaba Cloud DNS	Amazon Lightsail	Amazon Route 53
ArvanCloud	Aurora DNS	Autodns	Azure
Bindman	Bluecat	Checkdomain	CloudDNS
Cloudflare	ClouDNS	CloudXNS	ConoHa
Constellix	deSEC.io	Designate DNSaaS for Openstack	Digital Ocean
DNS Made Easy	DNSimple	DNSPod	Domain Offensive (do.de)
DreamHost	Duck DNS	Dyn	Dynu
EasyDNS	Exoscale	External program	Gandi Live DNS (v5)
Gandi	Glesys	Go Daddy	Google Cloud
Hetzner	Hosting.de	HTTP request	HyperOne
Internet Initiative Japan	INWX	Joker	Joohoi's ACME-DNS
Linode (v4)	Liquid Web	LuaDNS	Manual
MyDNS.jp	MythicBeasts	Name.com	Namecheap
Namesilo	Netcup	Netlify	NIFCloud
NS1	Open Telekom Cloud	Oracle Cloud	OVH
PowerDNS	Rackspace	reg.ru	RFC2136
RimuHosting	Sakura Cloud	Scaleway	Selectel
Servercow	Stackpath	TransIP	VegaDNS
Versio.[nl/eu/uk]	Vscale	Vultr	Yandex
Zone.ee	Zonomi